Owner can add booked periods to every property he submits from User Dashboard. Owner can DELETE these booked periods at any time.
Related Articles for how Owner Manages Calendar:
How to mark dates booked manually
Select booking dates by clicking on the dates (selection is red)
Booked dates are blocked in calendar, and in front end booking form:
How the booked dates look in the booking form:
How to delete booked period
You can mark dates as booked from All In One calendar as well -help https://help.wprentals.org/article/all-in-one-calendar-view/
In all in one calendar owner form looks like this.